Method and apparatus for operating an image sensing device

A method for operating an image sensing device which performs photoelectric conversion and stores converted charges having a plurality of pixels arranged in two dimensions, and which covered with a complementary color filter of magenta, green, cyan, and yellow, arranged in such a manner that different combinations of two colors are used in even rows and odd rows and appear alternatively, and the two colors in either the even rows or odd rows are arranged in a check pattern, and a plurality of vertical charge transfer means, each provided along each vertical line of said plurality of pixels, for transferring charges in the vertical direction for transferring charges in the vertical direction and horizontal charge transfer means for transferring charges in the horizontal direction, said method comprising:

• a reading step of reading image signals from the image sensing device by operating said vertical charge transfer means with eight operation signals and horizontal charge transfer means with two operation signals by 1) alternatively repeating a process of adding signals stored in pairs of adjoining pixels in the vertical direction in two rows while skipping two rows and outputting the resultant signals from said image sensing device, and a process of adding signals stored in pairs of adjoining pixels in the oblique direction in two rows by transferring signals in a row to said horizontal charge transfer means, shifting the signals in the horizontal direction by one pixel, transferring signals in a next row to said horizontal charge transfer means, and repeating the transferring and shifting of signals until the plurality of adjoining pixels are added in said horizontal transfer means while skipping two rows and outputting the resultant signals until one frame is processed in a field period, then alternatively repeating a process of adding signals stored in pairs of adjoining pixels in the vertical direction in two rows which are skipped previously, and a process of adding signals stored in pairs of adjoining pixels in the oblique direction in two rows which are skipped previously until one frame is processed in a next field period, and 2) by performing a process of adding image signals stored in pairs of adjoining pixels in two rows whose combination are changed every field period and outputting the resultant image signals;
• a luminance signal generation step of generating a luminance signal from the image signals of one row and of a previous row obtained at said reading step;
• and
• a color difference signal generation step of generating color difference signals from the image signals of the one row and of the previous row obtained at said reading step.

An image sensing apparatus comprising:

• an image sensing device which performs photoelectric conversion and stores converted charges, having:
• a plurality of pixels arranged in two dimensions and covered with a complementary color filter of magenta, green, cyan and yellow, arranged in such a manner that different combinations of two colors are used in even rows and odd rows and appear alternatively, and the two colors in either the even rows or odd rows are arranged in a check pattern;
• a plurality of vertical charge transfer means, each provided along each vertical line of said plurality of pixels, for transferring charges in the vertical direction, operated with eight operation signals;
• and
• horizontal charge transfer means for transferring charges in the horizontal direction;
• and
• control means for controlling said image sensing device with the operation signals for reading image signals 1) by alternatively performing a process of adding signals stored in pairs of adjoining pixels in the vertical direction in two rows while skipping two rows and outputting the resultant signals from said image sensing device and a process of adding signals stored in pairs of adjoining pixels in the oblique direction in two rows by transferring signals in a row to said horizontal charge transfer means, shifting the signals in the horizontal direction by one pixel, transferring signals in a next row to said horizontal charge transfer means, and repeating the transferring and shifting of signals until the plurality of adjoining pixels are added in said horizontal transfer means, while skipping two rows and outputting the resultant signals until one frame is processed in a field period, then alternatively performing a process of adding signals stored in pairs of adjoining pixels in the vertical direction in two rows which are skipped previously while skipping two rows and a process of adding signals stored in pairs of adjoining pixels in the oblique direction in two rows which are skipped previously while skipping two rows in a next field period until one frame is processed, and 2) by performing a process of adding image signals stored in pairs of adjoining pixels in two rows whose combination are changed every field period and outputting the resultant image signals;
• luminance signal generation means for generating a luminance signal from the image signals of one row and of a previous row;
• and
• color difference signal generation means of generating color difference signals from the image signals of the one row and of the previous row.

An image sensing apparatus comprising:

• an image sensing device which performs photoelectric conversion and stores converted charges having a plurality of pixels arranged in two dimensions;
• control means for controlling said image sensing device with operation signals so as to separately read image signals stored in a plurality of adjoining rows out of every predetermined number of rows then separately read image signals stored in a plurality of adjoining rows out of the rows which were not read previously;
• and
• storage means for storing the read image signals of all the pixels of an entire frame image.

An image sensing apparatus comprising:

• an image sensing device which performs photoelectric conversion and stores converted charges having:
• a plurality of pixels arranged in two dimensions and covered with a complementary color filter of magenta, green, cyan, and yellow, arranged in such a manner that different combinations of two colors are used in even rows and odd rows and appear alternatively, and the two colors in the even rows and the two colors in odd rows are arranged in check patterns;
• a plurality of vertical charge transfer means, each provided along each vertical line of said plurality of pixels, for transferring charges in the vertical direction, operated with eight operation signals;
• and
• horizontal charge transfer means for transferring charges in the horizontal direction;
• and
• control means for controlling said image sensing device with the operation signals for reading image signals by 1) alternatively repeating a process for adding signals stored in pairs of adjoining pixels in the vertical direction in two rows while skipping two rows and outputting the resultant signals from said image sensing device, and a process for adding signals stored in pairs of adjoining pixels in the oblique direction in two rows by transferring signals in a row to said horizontal charge transfer means, shifting the signals in the horizontal direction by one pixel, transferring signals in a next row to said horizontal charge transfer means, and repeating the transferring and shifting of signals until the plurality of adjoining pixels are added in said horizontal transfer means, while skipping two rows and outputting the resultant signals until one frame is processed in a field period, then alternatively repeating a process for adding signals stored in pairs of adjoining pixels in the vertical direction in two rows which are skipped previously while skipping two rows and a process for adding signals stored in pairs of adjoining pixels in the oblique direction in two rows which are skipped previously while skipping two rows in a next field period until one frame is processed, or 2) by performing a process for separately reading image signals stored in adjoining two rows while skipping two rows, then separately reading image signals stored in adjoining two rows skipped previously while skipping two rows;
• storage means for storing the read image signals of all the pixels of an entire frame image when the image signals are read in the latter processing controlled by said control means;
• luminance signal generation means for generating a luminance signal from the image signals of one row and of a previous row when the image signals are read in the former processing controlled by said control means, and generating a luminance signal from the image signals stored in said storage means when the image signals are read in the latter processing;
• and
• color difference signal generation means of generating color difference signals from the image signals of the one row and of the previous row when the image signals are read from said image sensing device in the former processing, and generating a color difference signal from the image signals stored in said storage means when the image signals are read in the latter processing.